Abstract: | Abstract Electroactivity ranges at polished Platinum, vitreous Carbon, and Mercury electrodes are determined in H2O - H3PO4 mixtures (0.1 -14 M H3PO4). The Ferrocene system is considered as a comparison system. Ag+/Ags and AgCl/Ags systems are considered as reference systems. The Ro(H) acidity function is determined. It varies from -2.0 to -6.0 when H3PO4 varies from 5.5 to 11.5 M. |